Oldshark Sport Lightweight Wireless Stereo Running & Gym/exercise Bluetooth Earbuds Headphones Headsets with Mic for iPad 5s 5c 4s 4, Ipad 2 3 4 New iPad, iPod, Android, Samsung Galaxy, Smart Phones Bluetooth Devices Black Advanced Bluetooth with CSR V4.0 System+EDR System delivers enhanced audio and bass response and delivers crystal-clear high notes, super dynamic mids, and deep bass. You can begin enjoying CD quality stereo sound instantly Locks In and Won't Fall Out. This headset is designed to lock in so you can focus on your workout. A behind-the-ear shape design means whatever the intensity of your workout you will get the perfect fit. It will stay firmly and comfortably in place. Durable design, Exercise is about breaking free so don't let wires hold you back. Skip tracks, control volume, take calls with a quick tap of your headset You can get Oldshark products with manufacturer warranty and customer service. ATTENTION: 1. Long press the bluetooth button for about 8-10 seconds until the blue light keep alternate with the red light, this means the bluetooth is in the paring status. 2. Turn on your cellphone bluetooth, find the device, "ZS-903" and connect it. The paring is successful when the red light stops flashing and only blue light flash, this means it pairs with your device. After this 2 steps, you can listening music and answer and refuse a call.